12.5kg bag of pottery / sculpting clay (Tutnalls GL15)

Acquired in a house clearance, this is a 12.5kg bag of Vulcan Black Stoneware Clay (Fine). Great for pottery, ceramics, sculpting or other clay projects. It has been stored outdoors, but the bag/contents appear to be intact (I don't use this stuff so I am not really sure if it goes off or anything.. ). If it's no good it will go to the tip but if you can make use of it - please come and collect :-)